\begin{table}%t2
\caption{\label{table2}Parameters derived from \emph{Yohkoh}/HXT data.}
%\centering
\small
\begin{tabular}{c c c c c}
\hline\hline
Power law index & Normalization constant & $P \geq E_{\rm c}=15$ & $P \geq E_{\rm c}=20$ & $P \geq E_{\rm c}=25$ \\
$\gamma$ & $A$ & ($10^{27}$~erg s$^{-1}$) & (10$^{27}$~erg s$^{-1}$) & ($10^{27}$~erg s$^{-1}$)\\
\hline
&&&& \\[-8pt]
3.399 $\pm$ 0.008 & $2.43 \pm 0.08 \times10^5$ & 8.61 $\pm$ 0.28 & 4.31 $\pm$ 0.14 & 2.53 $\pm$ 0.08 \\
\hline
\end{tabular}
\end{table}